Disconnective switch.



B. G. JA-MIESON. DISCONNECTIVE SWITCH. APPLICATION FILED JAN 23. I915.

Patehted B01114, 1915.

2 SHEETS-SHEET I.

H WIN B. G. JAMIESON.

DISCONNECTIVE SWITCH.

APPLlCATION FILED JAN 23, 1915.

Patented Dec. 14, 1915.

2 SHEETS-SHEET 2.

earneearner rich.

nnn'ralenn c arnrnrnson, or CHICAGO, ILLInoIs, ASSIGNOR or FOR'IY-NINE ONE- nulvnnnn'rns 'rofrannvnr J. RICHARDSON, or CHICAGO, ILLINOIS.

nisconivncr'lvii SWITCH.

"manner.

To all whom may concern:

Be it lmown that l, JBnR'rRANn G. Jan nasoN, a citizen of the United States, residmg at Chicago, in the'county of Cook and State of Illinois, have invented a certain new and useful Improvement in Disconnective Switches, of'which the following is a full,

. clear, concise, and exact description, refer ence be ng had to the accompanylng drawings', forming a part of this specification.

My invention relates to disconnective switches and has for its object the provision of a new switch of this kind which is adaptsubstantial quantity traversing the circuit.

The switch normally is to be used only when the circuit is substantially free from current, at which time the switch may be used for disconnective purposes as before stated.

My invention concerns itself with the provision of a c1rcu1t closing and openlng de vice which at any time may be interposed and used at practically any point in the length of a conductor without provision of the usual supports of an insulating and me chanical nature heretofore necessary for the various switch members; Such, insulating supports with attendant marble or slate slabs and fastenings frequently cost as much or more than th'cswitching device, itself and at times the space required for the accommodation of such supportsfin their entirety, is not obtainable at the location in which it is desired to install'a disconnecting device. Such insulating supports as mentioned also introduce into the circuit an additional hazard in that additionah points are thereby'provided at which failures of insulation may occur. Moreover the manipulation ahd operation of the various types'of switches at present used for the 'purposeydescribed requirethat the switch-be so located that the person desiring to manipulate it may exert a pushing and pulling effort, which fur= Specification of Iictters Patent. t t 14 19153 Application filed. Ianuary23, 1915. Serial No. 3,881.

'ther necessitates that the switch be so located with reference to adjacent walls, apparatu's, etc., that the operator may stand at a considerable distance away from vertically below the switch. This is especially true of the present form of switch if it be installed in a horizontal posit-ion at any height above the operators head with the plane of rotation of its blades also horizontal or if the switch be installed in a vertical position where the plane of rotation of its blade will also be vertical.

My invention, due to the manner in which the power necessary to overcome friction of the contact surfaces is applied entirely eliminates the thrusting and pulling effort on the part of the operator, and makes'possible instead the application of power in a torsional or rotary manner.

The great objects which my invention thus attains are,the provision of a contact closing and opening device of the character described which, when open ed and closed, will distribute and equalize the power applied to it in such manner as not to throw transverse or bending strain on the conductor with which it is in circuit, thereby obviating the necessity for support other than that which the conductor or bus bar itself is capable of furnishing, and further, the provision of a device of the character described that may be successfully and easily manipulated when located in any position that will normally be required in modern.

installations-of electrical apparatus,

I will describe one form which my invention may take more in detail by referring to the accompanying drawings in which- Figure 1 sets forth in general a style of bus bar construction having my mproved switch mounted in place; Fig. 2 IS an enlarged side view of my improved switch partly in section; Fig. 3 is a longitudinal vertical sectional view thereof; Fig. 4c is a sectional view on line a.a ofFig. 2; Fig. 5 is a sectional view through the stationary blades, 6n line 6-4) of Fig. 2, and Fig. 6 is aview similar to Fig. 2 showing the parts in an alternative position. I

' Referring more particularly to Fig. 1, I show a compartment 1 forming part of what may be a. network of compartments for carryin a plurality. of bus .conductors .2. The wa ls suchas 3'are preferably of cement or similar material and carry grooved insu- Mill latorst through which the bus conductor Qpasses.

My invention contemplates the interpositionct' a switch 5 in the bus conductor 2 in such a manner that the bus conductorneed not be supported directly at the switch, the switch being so arranged as not to throw the bus bar out of alinement when the switch is being opened and closed.

My improved device contemplates the. use of two lugs 6 and 7, the lug 6 having'attached thereto three switch clips 8, 9 and 10. The lug 7 has three clips attached thereto respectively the clips 11, 12 and 13 through which a pin 14 is mounted. Upon this pin 14 there are also mounted two swinging switch blades 16 and 15 which are adapted to rotate in opposite directions whenever the switch is being opened or whenever the switch is being closed. It will thus be seen that there is an equal pull sidewise on the bus conductor 2 whenever the switch blades 15 and 16 are two switch arms L5 and 16' moved so that there is no tendency to throw said bus conductor out of alinement. The have what might be called a scissor motion, thus not to disturb the alinement. Swingingly mounted upon the pin 1% is a bridge 17, which bridge carries a pinion 18 pivotally mounted therein and fixedly secured to a square head 19. This square head is adapted to be rotated by a handle 20, which handle is removable as readily apparent. The switch blade 15 has rigidly attached thereto a segmental rack 21 and the blade 16 has secured thereto the segmental rack 22. Both of these racks are in engagement with the pinion 18. Now whenever the pinion is rotated, then the racks are moved in opposite directions, thus to-rotate the switch blades 15 and 16 in opposite directions either to bring them into the position of Fig. 2 or to bring'theln into the position of Fig. 6. It will be readily seen that this scissor-like motion causes the blades to act with opposing forces upon the clips 8, 9 and 10, thus not to tend to bend the bus conductor 2.

From what has been described the nature of my invention will. be readily clear to those skilled in the art and it will also be clear that changes and modifications may be made without departing from its spirit.

Having however thus described one form which my invention may take, what I claim as new and desire tosecure by Letters Patcut is:

1. A device of the character described comprising the free ends of two conductors together with stationary and movable circuit making or'breaking members mounted respectively on said free ends, said contact making and breaking members having means to prevent disalining said conductors when said members are opened or closed.

2. A device of the character described comprising the free ends of two conductors together with switching means mounted re spectively on said free ends adapted to prevent disalining said conductors when said switching means are opened or closed.

3. A device of the character described comprising the free ends of two conductors together with switching means mounted respectively on said free ends adapted to prevent disalining said conductors when; said switching means are opened or closed, the forces exerted by said switching members when they are opened and closed at an angle to the axis of said conductors being balanced.

4:. A device of the character described comprising the free ends of two conductors, stationary switch clips mounted on the free end of one conductor, and a pair of oppositely movable switch blades mounted on the free end of the other conductor.

5. A device of the character described comprising the free ends of two conductors, stationary switch clips mounted on the free end of one conductor, a pair of oppositely movable switch blades mounted on the free end of the other conductor, and gearing for simultaneously moving said movable switch members.

6. A device of the character described comprising the free ends of two conductors. stationary switch clips mounted on the free end or" one conductor, a pair of oppositely movable switch blades mounted on the free end of the other conductor, gearing for simultaneously moving said movable switch members, and a handle for operating said gearing.

7. device of the character described comprising the free ends of two conduct-01's, stationary switch clips mounted on the free end of one conductor, a pair of oppositely movable switch blades mounted on the free end of the other conductor, gearing for simultaneously movingsaid movable switch members, and a handle for operating said gearing, said gearing including a pinion and two racks, said .racks being mounted respectively on the said two movable switch members.

In witness whereof, I hereunto subscribe my name this 21st day of September, A. 1.1,.

BERTRANb G. J'AMIESON. Witnesses:

HAZEL A. Jones, MAX W. ZABEL.

Copies oi this patent zilay be ohtained for five cents each, by addressing the Commissioner of Pa ents, Washington, D. G. 

